Buggy code:
public class PatientDataTest extends ValidationAwareMapper { @ Test public void shouldFailIfGivenNameIsBlank ( ) { } @ Test public void shouldFailIfGivenNameIsNull ( ) { } @ Test public void shouldFailIfSurNameIsBlank ( ) { } @ Test public void shouldFailIfDateOfBirthIsBlank ( ) { } @ Test public void shouldFailIfDateOfBirthIsInvalidDate ( ) { } @ Test public void shouldPassIfDateOfBirthIsValidDate ( ) { } @ Test public void shouldFailIfGenderIsBlank ( ) { } @ Test public void shouldFailIfNationalIdIsInvalid ( ) { } @ Test public void shouldPassIfNationalIdIs_13_DigitLong ( ) { } @ Test public void shouldPassIfNationalIdIs_17_DigitLong ( ) { } @ Test public void shouldFailIf_UID_LengthIsNotEqual_11 ( ) { } @ Test public void shouldFailIf_UUID_ContainSpecialCharacter ( ) { } @ Test public void shouldPassIf_UID_Is_11_DigitAlphaNumeric ( ) { } @ Test public void shouldPassIfBirthRegistrationNumberIsValid ( ) { } @ Test public void shouldFailIfBirthRegistrationNumberIsLessThan17 ( ) { } @ Test public void shouldFailIfBirthRegistrationNumberIsMoreThan17 ( ) { } @ Test public void shouldFailIfContainSpecialCharacter ( ) { } @ Test public void shouldPassIfFullNameBanglaIsValid ( ) { } @ Test public void shouldFailIfFullNameBanglaIsMoreThan_125_Characters ( ) { } @ Test public void shouldFailIfGivenNameIsMoreThan_100_Characters ( ) { } @ Test public void shouldPassIfGivenNameIsValid ( ) { } @ Test public void shouldPassIfSurNameIsValid ( ) { } @ Test public void shouldFailIfSurNameIsMoreThan_25_Characters ( ) { } @ Test public void shouldFailIfSurNameContainMultipleWord ( ) { } @ Test public void shouldFailIfPlaceOfBirthIsMoreThan_20_AlphabeticCharacters ( ) { } @ Test public void shouldFailIfPlaceOfBirthIsContainSpecialCharacterAndNumericCharacter ( ) { } @ Test public void shouldPassIfPlaceOfBirthIsValid ( ) { } @ Test public void shouldPassIfNationalityIsValid ( ) { } @ Test public void shouldFailIfNationalityIsMoreThan_50_Characters ( ) { } @ Test public void shouldFailIfPrimaryContactIsMoreThan_100_Characters ( ) { } @ Test public void shouldPassIfPrimaryContactIsValid ( ) { } private void assertLengthViolation ( String field , int length ) { } @ Test public void shouldPassIfPatientConfidentialIsValid ( ) { } @ Test public void shouldFailIfPatientConfidentialIsInvalid ( ) { } @ Test public void shouldPassIfPatientHouseholdCodeIsValid ( ) { } @ Test public void shouldFailIfPatientHouseholdCodeIsInvalid ( ) { } @ Test public void shouldRetrieveFieldValueFromJsonKey ( ) { } @ Test public void shouldRetrieveNonEmptyFieldNames ( ) { } @ Test public void shouldReturnTrueIfPatientBelongsToCatchment ( ) { } @ Test public void shouldPopulateRequester ( ) { UserProfile facilityProfile = new UserProfile ( FACILITY_TYPE , "f100" , Arrays . asList ( "3026" , "4019" ) ) ; UserProfile providerProfile = new UserProfile ( PROVIDER_TYPE , "p100" , Arrays . asList ( "1001" ) ) ; UserProfile adminProfile = new UserProfile ( ADMIN_TYPE , "a100" , Arrays . asList ( "2020" ) ) ; UserInfo userInfo = new UserInfo ( "102" , "ABC" , "abc@mail" , 1 , true , "111100" , new java . util . ArrayList ( Arrays . asList ( MCI_USER_GROUP ) ) , Arrays . asList ( adminProfile , providerProfile , facilityProfile ) ) ; PatientData patient = new PatientData ( ) ; <START_BUG> patient . setProviderUrl ( "p000" ) ; <END_BUG> patient . setRequester ( userInfo . getProperties ( ) ) ; Requester requester = patient . getRequester ( ) ; assertNotNull ( requester ) ; RequesterDetails provider = requester . getProvider ( ) ; assertNotNull ( provider ) ; assertEquals ( "p100" , provider . getId ( ) ) ; assertNull ( provider . getName ( ) ) ; RequesterDetails facility = requester . getFacility ( ) ; assertNotNull ( facility ) ; assertEquals ( "f100" , facility . getId ( ) ) ; assertNull ( facility . getName ( ) ) ; } }

Fix:
patient . setProvider ( "p000" ) ;